Supercell over Laramie
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Wyoming Snow Precipitation Update

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of FRIDAY: JANUARY 12 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 10.4 8.9 117 12.0 11.8 102 Black Bear 8170 -M 20.0 * -M 20.8 * Blind Bull Sum 8650 16.7 11.6 144 10.6 10.9 97 Cottonwood Creek 7670 10.3 9.6 107 12.1 13.3 91 East Rim Divide 7930 5.8 5.3 109 6.4 6.5 98 Grand Targhee 9260 27.9 20.8 134 16.6 17.7 94 Granite Creek 6770 9.0 7.9 114 11.9 11.3 105 Grassy Lake 7265 13.9 15.7 89 17.9 19.9 90 Gros Ventre Summit 8750 9.3 7.2 129 8.7 7.0 124 Gunsight Pass 9820 8.9 7.1 125 9.4 7.6 124 Lewis Lake Divide 7850 17.1 15.7 109 19.1 19.5 98 Phillips Bench 8200 12.8 13.6 94 13.6 15.3 89 Salt River Summit 7640 4.8 5.8 83 6.9 8.9 78 Snake River Station 6920 8.9 8.3 107 13.2 12.9 102 Spring Creek Divide 9000 12.3 11.2 110 12.5 13.0 96 Thumb Divide 7980 10.1 7.6 133 11.3 10.3 110 Togwotee Pass 9580 17.7 12.6 140 17.9 13.5 133 Two Ocean Plateau 9240 22.2 15.0 148 16.3 14.8 110 Willow Creek 8080 15.4 13.2 117 18.0 18.2 99 Younts Peak 8350 -M 7.9 * -M 9.0 * ----- ----- Basin Index (%) 118 101 MADISON-GALLATIN Black Bear 8170 -M 20.0 * -M 20.8 * Canyon 7870 8.9 6.8 131 10.6 9.0 118 Madison Plateau 7750 12.7 11.5 110 14.0 14.6 96 West Yellowstone 6700 -M 5.9 * -M 8.2 * Whiskey Creek 6800 7.4 8.1 91 9.5 11.3 84 ----- ----- Basin Index (%) 110 98 YELLOWSTONE Beartooth Lake 9360 21.1 11.7 180 19.4 10.7 181 Burnt Mtn 5880 2.9 2.0 145 8.4 7.2 117 Canyon 7870 8.9 6.8 131 10.6 9.0 118 Cole Creek 7850 8.3 6.8 122 5.8 6.8 85 Evening Star 9200 22.3 13.5 165 23.6 15.3 154 Fisher Creek 9100 28.6 17.3 165 24.2 17.5 138 Northeast Entrance 7350 6.1 5.0 122 9.5 7.0 136 Parker Peak 9400 19.3 11.2 172 -M 9.7 * Sylvan Lake 8420 13.8 10.9 127 14.9 12.7 117 Thumb Divide 7980 10.1 7.6 133 11.3 10.3 110 Two Ocean Plateau 9240 22.2 15.0 148 16.3 14.8 110 White Mill 8700 21.6 12.0 180 15.8 13.1 121 Wolverine 7650 9.5 5.6 170 12.2 7.1 172 ----- ----- Basin Index (%) 155 131 WIND RIVER Burroughs Creek 8750 8.8 -M * 10.3 -M * Castle Creek 8400 5.0 -M * 6.4 -M * Cold Springs 9630 5.6 3.7 151 6.1 5.5 111 Deer Park 9700 7.1 7.1 100 8.6 10.7 80 Hobbs Park 10100 10.5 7.2 146 8.8 6.8 129 Kirwin 9550 11.8 5.0 236 10.4 6.4 162 Little Warm 9370 9.9 5.3 187 9.8 7.0 140 Owl Creek 8975 2.6 2.8 93 4.3 3.1 139 South Pass 9040 6.9 7.3 95 5.0 9.5 53 St. Lawrence Alt 8620 2.5 3.4 74 5.7 4.7 121 Togwotee Pass 9580 17.7 12.6 140 17.9 13.5 133 Townsend Creek 8700 4.4 4.2 105 5.8 6.3 92 ----- ----- Basin Index (%) 135 112 BIGHORN BASIN Bald Mtn. 9380 11.0 9.6 115 7.3 9.1 80 Bear Trap Meadow 8200 4.1 2.8 146 5.2 4.6 113 Bone Springs Div 9350 9.2 8.2 112 7.0 8.1 86 Grave Springs 8550 3.2 4.1 78 2.9 5.7 51 Kirwin 9550 11.8 5.0 236 10.4 6.4 162 Marquette 8760 3.7 -M * 6.8 -M * Middle Powder 7760 4.5 5.7 79 3.4 6.5 52 Owl Creek 8975 2.6 2.8 93 4.3 3.1 139 Powder River Pass 9480 8.2 5.6 146 6.8 6.7 101 Shell Creek 9580 11.3 7.8 145 7.6 7.4 103 Timber Creek 7950 2.2 2.3 96 1.7 4.1 41 ----- ----- Basin Index (%) 126 92 SHOSHONE RIVER Blackwater 9780 20.6 12.4 166 18.1 11.3 160 Evening Star 9200 22.3 13.5 165 23.6 15.3 154 Marquette 8760 3.7 -M * 6.8 -M * Sylvan Road 7120 7.0 6.2 113 11.9 10.3 116 Younts Peak 8350 -M 7.9 * -M 9.0 * ----- ----- Basin Index (%) 155 145 POWDER RIVER Bear Trap Meadow 8200 4.1 2.8 146 5.2 4.6 113 Cloud Peak Reservoir 9860 7.7 6.9 112 7.4 6.9 107 Grave Springs 8550 3.2 4.1 78 2.9 5.7 51 Hansen Sawmill 8360 3.7 3.4 109 5.0 4.4 114 Middle Powder 7760 4.5 5.7 79 3.4 6.5 52 Powder River Pass 9480 8.2 5.6 146 6.8 6.7 101 Soldier Park 8720 2.6 -M * 5.4 -M * ----- ----- Basin Index (%) 110 88 TONGUE RIVER Big Goose 7990 3.4 4.1 83 4.0 5.7 70 Bone Springs Div 9350 9.2 8.2 112 7.0 8.1 86 Burgess Junction 7880 4.2 5.3 79 4.0 6.5 62 Dome Lake 8880 5.8 5.8 100 5.4 7.3 74 Little Goose 8870 4.3 -M * 6.2 -M * Sucker Creek 8880 4.7 6.0 78 -M 7.4 * Tie Creek 6870 1.6 2.4 67 4.7 6.2 76 ----- ----- Basin Index (%) 91 74 BELLE FOURCHE Cole Canyon 5910 2.4 2.5 96 4.3 5.1 84 ----- ----- Basin Index (%) 96 84 CHEYENNE RIVER BASIN Blind Park 6890 3.3 3.9 85 5.3 6.6 80 North Rapid Creek 6130 3.5 3.5 100 3.8 5.6 68 ----- ----- Basin Index (%) 92 75 UPPER N. PLATTE Arapaho Ridge 10960 9.8 10.9 90 9.8 12.5 78 Blackhall Mtn 9820 13.1 -M * 13.5 -M * Columbine 9160 5.3 11.6 46 12.0 13.6 88 Divide Peak 8880 6.8 9.9 69 10.1 11.6 87 Joe Wright 10120 8.1 10.7 76 14.8 13.7 108 Laprele Creek 8375 2.9 4.6 63 4.2 6.5 65 Med Bow 10500 19.5 -M * 16.7 -M * North French Creek 10130 13.8 13.4 103 14.3 14.1 101 Never Summer 10280 8.9 10.3 86 7.7 -M * Old Battle 10000 11.8 15.1 78 11.2 18.9 59 Rawah 9020 5.2 5.2 100 8.3 8.3 100 Sage Creek Basin 7850 4.7 6.9 68 6.3 8.6 73 Sand Lake 10050 13.5 13.9 97 11.1 12.8 87 South Brush Creek 8440 5.5 5.8 95 7.1 8.1 88 Tower 10500 15.5 21.2 73 15.8 21.4 74 Webber Springs 9250 8.3 11.5 72 10.5 14.3 73 Willow Creek Pass 9540 7.1 6.1 116 7.6 7.2 106 Zirkel 9340 9.5 14.5 66 14.5 16.3 89 ----- ----- Basin Index (%) 80 84 SWEETWATER Deer Park 9700 7.1 7.1 100 8.6 10.7 80 Larsen Creek 9000 4.2 5.8 72 6.9 -M * South Pass 9040 6.9 7.3 95 5.0 9.5 53 ----- ----- Basin Index (%) 90 67 LOWER N. PLATTE Casper Mtn. 7900 4.2 6.7 63 3.7 8.0 46 Laprele Creek 8375 2.9 4.6 63 4.2 6.5 65 Reno Hill 8400 5.3 6.5 82 6.2 7.8 79 Windy Peak 7900 2.5 3.4 74 4.0 5.6 71 ----- ----- Basin Index (%) 70 65 LARAMIE RIVER Brooklyn Lake 10240 11.4 10.1 113 12.1 10.6 114 Cinnabar Park 9574 11.7 11.3 104 13.8 13.8 100 Crow Creek 8330 -M 4.9 * 6.1 5.9 103 Deadman Hill 10220 10.4 7.9 132 10.3 8.8 117 Rawah 9020 5.2 5.2 100 8.3 8.3 100 Roach 9700 7.3 8.2 89 9.7 10.1 96 ----- ----- Basin Index (%) 108 105 S. PLATTE Black Mountain 8920 4.6 -M * 7.1 -M * Crow Creek 8330 -M 4.9 * 6.1 5.9 103 Deadman Hill 10220 10.4 7.9 132 10.3 8.8 117 ----- ----- Basin Index (%) 132* 112 LITTLE SNAKE RIVER Battle Mountain 7440 2.4 5.1 47 5.2 8.2 63 Divide Peak 8880 6.8 9.9 69 10.1 11.6 87 Elk River 8700 6.7 8.6 78 8.3 10.6 78 Little Snake River 8915 8.7 11.7 74 13.7 17.5 78 Old Battle 10000 11.8 15.1 78 11.2 18.9 59 Sage Creek Basin 7850 4.7 6.9 68 6.3 8.6 73 Sandstone RS 8150 4.3 6.1 70 4.2 10.0 42 Whiskey Park 8950 9.1 11.8 77 12.2 14.4 85 ----- ----- Basin Index (%) 72 71 UPPER GREEN RIVER Big Sandy Opening 9080 7.5 6.9 109 7.7 7.2 107 Blind Bull Sum 8650 16.7 11.6 144 10.6 10.9 97 East Rim Divide 7930 5.8 5.3 109 6.4 6.5 98 Elkhart Park G.S. 9400 6.6 6.1 108 6.6 7.3 90 Gros Ventre Summit 8750 9.3 7.2 129 8.7 7.0 124 Gunsight Pass 9820 8.9 7.1 125 9.4 7.6 124 Kendall R.S. 7740 8.4 6.1 138 9.3 7.8 119 Loomis Park 8240 8.9 7.3 122 9.6 9.5 101 New Fork Lake 8340 6.5 5.3 123 5.5 6.0 92 Pocket Creek 9360 6.1 -M * 5.3 -M * Snider Basin 8060 5.9 6.1 97 7.8 7.8 100 Spring Creek Divide 9000 12.3 11.2 110 12.5 13.0 96 Triple Peak 8500 13.1 10.6 124 15.0 13.3 113 ----- ----- Basin Index (%) 121 105 LOWER GREEN RIVER Blacks Fork Jct 8869 3.5 -M * 4.8 -M * Buck Pasture 9632 6.0 -M * 6.6 -M * EF Blacks Fork GS 9360 3.3 -M * 3.7 -M * Hams Fork 7840 4.3 5.4 80 5.0 6.1 82 Hewinta 9500 3.4 4.7 72 5.8 7.3 79 Hickerson Park 9122 3.2 3.1 103 2.8 5.4 52 Hole-in-Rock 9168 2.8 3.3 85 3.1 5.1 61 Indian Creek 9425 10.6 11.6 91 8.2 11.8 69 Kelley R.S. 8180 6.6 7.1 93 7.6 9.8 78 Spirit Lk 10235 3.6 -M * 4.2 -M * Steel Creek Park 10158 6.7 7.0 96 6.8 8.5 80 ----- ----- Basin Index (%) 89 73 UPPER BEAR RIVER Bear River RS 8777 3.9 -M * 5.4 -M * Bug Lake 7987 6.6 7.8 85 8.8 10.5 84 Burts Miller Ranch 8000 2.4 -M * 3.4 -M * Chalk Creek #1 9171 7.3 11.2 65 8.9 13.3 67 Hayden Fork 9130 6.1 6.7 91 7.9 11.1 71 Kelley R.S. 8180 6.6 7.1 93 7.6 9.8 78 Lily Lake 9133 5.3 6.1 87 5.8 9.1 64 Monte Cristo 8932 10.3 12.9 80 10.2 13.8 74 Salt River Summit 7640 4.8 5.8 83 6.9 8.9 78 ----- ----- Basin Index (%) 82 73 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.